Why would my rooster and hen separate after being together for so long

I have two free-roaming chicken that have been together since i got them (they were probably about a month old) and now they are about 6 months old.. maybe more. Just recently, I've noticed only my hen has been showing up for some food. This made me panic because I was thinking maybe someone took my rooster but during their usual sleeping time, i hear my rooster crowing away in the tree near my room. The next morning he crows again and leaves the hen alone. I feel really bad for her because she was always following him and despite his pecking, she would stay. Now it's like they got a divorce or something. Does anyone know why this is happening?

If they are completely free range (which it sounds) he might be trying to find his manhood. He might not know yet what a hen is for. But really don't know how to help. I would say give him a little while. He might be getting around the hen and not letting you see.

Well I don't know but here is a thought... His urg to mate is suppressed by the season and lack of light as is hers. They just "aren't in the mood" Let us know next spring if he and she have a new affinity for each other after the light becomes longer.